Interactions of antibiotics with Pseudomonas fluorescens strain A506 in the control of fire blight and frost injury to pear.
Interactions of antibiotics with Pseudomonas fluorescens strain A506 in the control of fire blight and frost injury to pear.
复制标题
抗生素与荧光假单胞菌 A506 菌株在控制梨火疫病和冻害中的相互作用。
DOI：
10.1094/phyto-86-841
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
R. Elkins
中科院分区：
文献类型：
--
作者：
S. Lindow;G. Mcgourty;R. Elkins
对荧光假单胞菌A506菌株及其耐药的抗菌素链霉素和土霉素进行了长达16年的田间试验，以评价杀菌剂和拮抗细菌对梨火疫病和霜冻病的交互作用和相对药效。菌株A506在接种一次的果枝上保持了大于105个细胞的种群数量，持续了30天以上。在接种的树上，90%以上的花含有可检测到的菌株A506。在接种链霉素的树上，菌株A506的种群数量与只喷洒菌株A506的树上的种群数量一样高。A506菌株处理的树上冰核活性细菌的数量比未处理的对照树或仅喷洒抗生素的树低约100倍。自然霜冻对梨果实的冻害和火疫病的发生率分别降低到对照的40%和50%左右。在A506菌株和抗生素联合处理的树木上，霜冻病和火疫病的发生率比单独使用任何一种药剂都要低。菌株A506和抗生素在防治霜冻和病害方面具有相加作用。
Pseudomonas fluorescens strain A506 and the antibiotics streptomycin and oxytetracycline, to which this antagonist is resistant, were evaluated individually and in combination in field trials over a 16-year period to assess the interactions and relative efficacy of bactericides and antagonistic bacteria in the control of fire blight and frost injury to pear. Strain A506 maintained population sizes of greater than about 10 5 cells per fruiting spur for over 30 days on trees inoculated once with this strain. Over 90% of the flowers on inoculated trees harbored detectable populations of strain A506. The population sizes of strain A506 were as high on inoculated trees, to which streptomycin was applied, as on trees sprayed only with strain A506. The population sizes of ice nucleation active bacteria were about 100-fold lower on trees treated with strain A506 than on untreated control trees or trees sprayed only with antibiotics. The incidence of frost injury to pear fruit in natural frosts and of fire blight was reduced to about 40 and 50%, respectively, of that on untreated trees. The incidence of frost damage and fire blight was lower on trees treated both with strain A506 and antibiotics than with either agent alone. Strain A506 and antibiotics acted additively in the control of frost and disease.